690+: System Board Terminals
Terminal A: Additional Digital Outputs
Terminal B: Master Reference which is used as referenceÂ
Terminal C: Slave Encoder which can be used as either a reference or as the actual feedback like the 6055/HTTL encoder card
Terminal D: Encoder Reference Output which is used to output the encoder signal from the drive
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For more information please consult the manual found on by following this QuickLink for the 690+ on Parker.com - (Manual, QuickStarts, Product Support, etc)